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NYC-WTC_000229751

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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8138 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: 12 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/17/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Stnjcture Norv EDS No (Nonadb F B C M >=05 p : '=5p Chrys Amphibole Nonasb Ambig/ND No Coord Elements)

C?

Struct = > 0.5g >5; I Aspect Ratio Grid acceptance: 'Z = Posibve diffraction pattern properties conforming to *5°'^ undissolved filter, overlapped or folded Totals laboratory - identirication criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5m A- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile amphiboLes Amphibole F = Single Fiber Amosite B = Bundle (<3 libers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-ldentified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003387876

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229751

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NYC-WTC_000229751Source: NYC Law Department, mirrored locally

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Asbestos air TEM analysis log, March 2002

NYC-WTC_000176459

Administrative log recording sample identification, filter details, and operator information for asbestos air samples analyzed in March 2002.

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